Particle size distribution of gravelly soil plays a crucial role in debris flow initiation. For better understanding the mechanism of debris flow formation, two crucial mechanical property parameters of the gravelly soil are required to be studied meticulously: hydraulic conductivity and strength. With the aim of measuring the composition of the gravelly soil, 182 soil samples were taken from d...

In this paper, we provide a well-posedness theory for weak measure solutions of the Cauchy problem for a family of nonlocal interaction equations. These equations are continuum models for interacting particle systems with attractive/repulsive pairwise interaction potentials. The main phenomenon of interest is that, even with smooth initial data, the solutions can concentrate mass in finite time...

In this paper, 3D particle focusing in a straight channel with asymmetrical expansion-contraction cavity arrays (ECCA channel) is achieved by exploiting the dean-flow-coupled elasto-inertial effects. First, the mechanism of particle focusing in both Newtonian and non-Newtonian fluids was introduced. Then particle focusing was demonstrated experimentally in this channel with Newtonian and non-Ne...

In this work, we studied a pressure-driven flow of a magnetorheological suspension through a cylindrical tube in the presence of a non-uniform magnetic field perpendicular to the tube and varying along its axis. The flow was realized with the help of a commercial capillary rheometer in a controlled-velocity mode. Experimental pressure-flow rate curves exhibited a local minimum, and flow instabi...

Pneumatic conveying, in which granular materials are transported using a gas phase, is an important industrial process for bulk particulate transport. This is usually carried out in either a dilute phase, in which the particles are effectively suspended in the gas phase, or a dense phase, in which the particles move in a bulk flow. Dense phase conveying is becoming increasingly popular as it re...

The objective of this study is to understand the dynamics freely evolving particle suspensions over a wide range particle-to-fluid density ratios. are characterized by average momentum equation, where dominant contribution transfer between particles and fluid drag force. In study, force quantified using particle-resolved direct numerical simulation in canonical problem: statistically homogeneou...

In the sheath region, the ion flow to the electrode provides a distinctive direction, with the plasma properties different in the direction parallel or perpendicular to the flow. The ion flow is responsible for the generation of the wake potential for a test dust particle, which in the linear approximation is within the Mach cone for supersonic ion velocities. The bottom dust particle appearing...

Both visualization and simulation tasks make high demands on accuracy and interactivity. The former is an evident requisite of any tool focusing on quality, the latter stands for a responsive system in which the user has real-time control. A permanent trade-off between both demands can be observed, since high accuracy is usually time-consuming. The graphics processing unit (GPU), which evolved ...

Both visualization and simulation tasks make high demands on accuracy and interactivity. The former is an evident requisite of any tool focusing on quality, the latter stands for a responsive system in which the user has real-time control. A permanent trade-off between both demands can be observed, since high accuracy is usually time-consuming. The graphics processing unit (GPU), which evolved ...